CAC Payback Period Calculator
Months to recover acquisition cost from gross margin.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
SaaS founders, operators and investors rely on the free CAC Payback Period Calculator to nail CAC Payback Period in seconds — no spreadsheets, no sign-up. Enter your numbers, get an accurate result instantly, and compare scenarios to make smarter pricing, budgeting and growth calls.
About CAC Payback Period Calculator
CAC payback period is the number of months it takes to earn back what you spent to acquire a customer, using their gross-margin contribution. The formula is simple: CAC Payback (months) = CAC ÷ (Monthly Revenue per Customer × Gross Margin %). For example, $600 CAC ÷ ($100 × 70%) is about 8.6 months. The free CAC Payback Period Calculator does the math for you — just enter your customer acquisition cost, monthly revenue per customer and gross margin and read the result instantly. It runs entirely in your browser with no sign-up, no limits and nothing to install.
How to use CAC Payback Period Calculator
- 1Enter your customer acquisition cost, monthly revenue per customer and gross margin into the calculator.
- 2The CAC Payback Period is computed automatically using the formula CAC Payback (months) = CAC ÷ (Monthly Revenue per Customer × Gross Margin %) — there's no button to press.
- 3Change any input to model a different scenario, then note or copy the result.
Why use CAC Payback Period Calculator?
- ✓Calculates CAC Payback Period instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the numbers you enter stay private
- ✓Updates live as you type — perfect for comparing scenarios
Frequently asked questions
How do you calculate CAC Payback Period?+
CAC payback period is the number of months it takes to earn back what you spent to acquire a customer, using their gross-margin contribution. The formula is: CAC Payback (months) = CAC ÷ (Monthly Revenue per Customer × Gross Margin %). For example, $600 CAC ÷ ($100 × 70%) is about 8.6 months.
What's a good CAC payback period?+
Under 12 months is healthy for most SaaS; under 6 months is excellent and lets you reinvest in growth faster.
Is the CAC Payback Period Calculator free to use?+
Yes — it's completely free, with no sign-up, no login and no usage limits. You can run it as many times as you like.
Is my data private?+
Yes. The CAC Payback Period Calculator runs entirely in your browser, so the figures you enter are never uploaded or stored on any server.
Embed CAC Payback Period Calculator on your website
Want CAC Payback Period Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
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